Linear Regulator with Linear Roller Assembly Dimmer Regulator with Carbon Brush Assembly 1. This design is non standard as no IS specification has been drawn out for it. 2. All three phases are controlled with a single motor and hence not suitable for unbalanced loads. 3. Roller contact has point contact which results in high current density causing sparking & pitting. 4. Wear and tear of carbon rollers due to friction and that of copper winding due to pitting. 5. Replacement cost of carbon roller is much more. 6. No load losses are very high ,so in case where load is fluctuating from 0 to 100% overall energy losses are more. 7....
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